Why (not) 3D print (mass production, etc)?

Why (not) 3D print (mass production, etc)?

3D printing can be an efficient method of mass-producing needed supplies to prevent shortages. In one example of successful use of 3D printing, respirator valves are already being 3D printed in response to the increased need for mechanical ventilation in Italian hospitals. However, medical devices pose unique problems that require additional precautions in 3D printing.